Jura Descaling Instructions (2026): How to Use Descaling Tablets Step-by-Step

Quick Answer: Use 3 Jura descaling tablets (not 2) dissolved in a full tank of cold water. Wait until tablets are fully dissolved before starting the program. The cycle takes 30-45 minutes. If the machine still prompts to descale afterward, run a second cycle - heavy scale buildup sometimes needs two passes. Never use white vinegar; it damages internal seals.

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Scale is the number one cause of premature failure in espresso machines. Calcium and magnesium from your water supply deposit on heating elements, pipes, and valves, reducing flow, affecting temperature, and eventually causing breakdowns. Regular descaling prevents all of this.

When to Descale

Your Jura will prompt you when descaling is due, but here are the general guidelines:

• Soft water (0-3 grains hardness): Every 3-4 months
• Medium water (4-7 grains): Every 2-3 months
• Hard water (8+ grains): Every 1-2 months
• With CLARIS filter installed: The filter reduces scale, extending intervals to 3-6 months depending on water hardness

Test your water hardness using the test strip included with your Jura, or pick up inexpensive strips from any hardware store. This tells you how often you need to descale.

What You Need

• Jura descaling tablets (3 tablets per cycle, dissolved in a full water tank)
• Fresh water for rinsing
• A container (at least 500ml) to catch discharge water
• 30-45 minutes of time (the machine does the work, but you need to be nearby)

Descaling Essentials

Official Jura-approved products to keep your machine running clean.

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Most Important

Jura Descaling Tablets

Official formula. 3 tablets per cycle (dissolved in a full tank). Fully automated 30-45 minute cycle. Safe for all current Jura models.

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Prevent Scale

Jura CLARIS Smart Filter

Reduces scale before water reaches the boiler. Extends descaling intervals from monthly to 3-6 times per year.

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Step-by-Step Descaling Process

1. Prepare the machine

• Empty the drip tray and grounds container
• Remove the water filter (CLARIS cartridge) if installed
• Empty and refill the water tank with fresh water

2. Dissolve the descaling tablets

• Drop 2 Jura descaling tablets into the water tank (or follow your model’s specific instructions)
• Wait until the tablets dissolve completely before proceeding

3. Start the descaling program

• Navigate to the Maintenance or Care menu on your machine
• Select “Descaling” and follow the on-screen prompts
• The machine will cycle descaling solution through the water system in stages

4. During the cycle

• The machine will pause periodically to let the solution soak
• You may need to empty the drip tray once during the process
• Do not turn off the machine or interrupt the cycle

5. Rinse

• When prompted, empty the water tank completely
• Rinse it thoroughly and fill with fresh, clean water
• The machine will run a rinse cycle to flush all descaling solution
• Repeat the rinse if your model requires it

6. Finish up

• Reinstall the water filter
• Empty and clean the drip tray
• Run one hot water cycle before making your first drink

For a more detailed walkthrough with model-specific notes, see our full descaling article.

Products to Use (and Avoid)

Prevention: CLARIS Water Filters

The best way to reduce descaling frequency is to use a CLARIS water filter in the tank. The filter removes calcium and magnesium before they enter the system. Replace it every 50 liters or when your machine prompts you.

With a CLARIS filter, many owners only need to descale 2-3 times per year instead of every 1-2 months. See our Jura CLARIS filter guide for the full compatibility table - which filter fits which model, and the replacement schedule by water hardness level.

Signs You Are Overdue for Descaling

• Espresso comes out at a trickle instead of a steady stream
• Brewing is noticeably slower than usual
• Water temperature seems inconsistent
• The machine displays a descaling warning
• You hear louder-than-normal pump noise during brewing

If you see any of these signs, descale immediately. Ignoring scale buildup can lead to expensive repairs.

Keep Your Descaling Tablets Stocked

A descaling cycle uses one tablet per session, every 3-4 months. Running out mid-cycle means leaving the machine in a partially descaled state - always keep a few in reserve.

Back to maintenance hub | See also: Cleaning guide | Cleaning products | Descaling stuck or not completing | Can you use Jura without a water filter? | All guides